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the world with highly functional sports watches. Two new mechanical diver’s watch models, inspired by the design of the 1977 Challenge Diver, will be released from the collection with upgraded specifications, including a movement with enhanced magnetic resistance.
CITIZEN’s archives contain a fascinating story about a lost Challenge Diver watch. In 1983, a Challenge Diver was found on Long Reef Beach in Australia. The watch was covered in barnacles after being submerged in the Pacific Ocean, but the movement inside had remained
The sapphire glass has a flat cut top and a domed underside, and the sides of the glass are beveled to provide a chunky, retro look. The watches have a guardless crown design, and the 41.0 mm diameter is the same as the original model. The case is made of lightweight, scratch-resistant Super Titanium™*¹, and is thinner than the original model to ensure a more comfortable fit on the wrist.
The Cal. 9051 movement in this model uses anti-magnetic materials for the balance spring and surrounding components to boost the magnetic resistance of the watch. It maintains its performance even when placed 1 centimeter from a device emitting a magnetic field. The watches are also resistant to magnetic fields from everyday devices, including smartphones, and they can even be used aboard ships with magnetic compasses. In addition to being resistant to magnetic fields, the watches are also ISO compliant*² diver’s watches up to 200 meters. They can run for 42 hours when fully wound, with daily accuracy of -10 to +20 seconds.